That's one of the reasons that I'm weary of getting any dual card setups, unless the benefits from dual cards for around the same price are overwhelming.

I'd say stay away from CF if you are going to multi GPU. I've had CF setups with 3870, 4670, 4870 and 6970's and have to say there really was nothing good about any except for the 4670's. Everyone else either gave me worse performance (3870/4870) or the increase wasn't worth the price (6970). The 4670's actually did decent after I overclocked. My FPS jumped quite a bit with them while the 3870's and 4870's gave me lower FPS until I dropped my AA/AF down.

580 if you want to buy now and be able to have a good card and an upgrade option, 460 or refurb 480 if you want to wait or 560 ti's if you want to have a pretty damn good setup over the 580 and then head to the Kepler's later on down the road after they're established a way.

I'd say stay away from CF if you are going to multi GPU. I've had CF setups with 3870, 4670, 4870 and 6970's and have to say there really was nothing good about any except for the 4670's. Everyone else either gave me worse performance (3870/4870) or the increase wasn't worth the price (6970). The 4670's actually did decent after I overclocked. My FPS jumped quite a bit with them while the 3870's and 4870's gave me lower FPS until I dropped my AA/AF down.

580 if you want to buy now and be able to have a good card and an upgrade option, 460 or refurb 480 if you want to wait or 560 ti's if you want to have a pretty damn good setup over the 580 and then head to the Kepler's later on down the road after they're established a way.

I'd always heard that there were lots of problems with crossfire setups, but I hadn't heard directly from anyone so I wasn't sure.